Looking for the next great iOS brawler? You won’t find it here, but the free Injustice: Gods Among Us is still well worth downloading, especially for comic book fans. Playing as 18 of the DC Universe’s most popular heroes and villains, you’ll battle Flash, The Joker, and company in frantic, surprisingly addictive 2D-style bouts.

If there’s one thing that all musicians tend to fret over, it’s pitch. That's a little easier to hear than to try to describe, but when you’re listening to your favorite song being tortured at a local karaoke spot, you’ll know when it’s not being kept in tune by some buzzed bar patron. There are more than a couple of competent iOS apps that use the built-in microphone and/or incoming audio signal, sample it, and check to see if it is indeed in tune, but Tunable puts a truly new, innovative spin on the overall concept. In the process, it delivers on the promise of being a one-stop tuning shop.

One-tap, Instagram-style filter apps are a dime a dozen, so why not give your photos a unique look by actually lifting objects off of their background instead? That’s the premise behind PopAGraph, a slickly produced image editing app for the iPhone. PopAGraph uses Photoshop-style masking tools to separate key objects from an image, making them "pop" away from the background to create a 3D-style effect. It’s a clever trick and the developers do a good job of pulling it off.

If good artists borrow and great artists steal, how do we classify the artists who break and enter but leave the real treasure behind? It’s not difficult to spot the commonalities between The Other Brothers and Nintendo’s classic Super Mario entries. Both are side-scrolling platform games, feature a damsel in distress, and are rendered in wonderful pixel art. Both even star a pair of silly mustachioed men who wear caps and overalls. But The Other Brothers sadly does not capture its spiritual predecessor’s signature feel.

Ferrying a flock of afro-adorned critters through a ghastly gauntlet of increasingly menacing shadow machines is a challenging, sometimes messy affair in Badland. It's easy to get swept away by the gorgeous scenery cycling in the background of each doom-filled stage, but failing to focus on the dark traps springing to life in the foreground does not bode well for your gaggle. This interesting and visually distinct one-button game layers unique mechanics around its simple premise to keep you tapping along even when your cute crew gets shredded to pieces over and over again.

Despite its wide catalog of beloved characters, Disney’s mobile games (like the great Where's My Water?) have often introduced their own leads created especially for each game. The company's latest such entry is Mittens, a physics-based puzzle-platformer starring that favorite of Internet obsessions: Cats. Mittens is strung together by adorable animated cutscenes, which show the irascible titular feline attempting to woo a prissy purple kitty. Every time Mittens tries to give her a gift, she inevitably grows distracted by some other potential sign of affection. As a result, each set of stages introduces a new target gift to win her heart, like milk, balloons, and chocolates.

Something about the great American pastime brings out the best in app designers. MLB.com At Bat's breathtaking ballparks and pitch trackers are the gold standard for professional sports apps, Topps Pennant turns lifeless box scores into beautiful works of art, and iScore reimagines the dull, antiquated scorecard with lush textures and vivid charts. Race to the Pennant makes a strong case for joining that list. With a simple, colorful interface, the app offers a slick visual interpretation of baseball standings that makes following your favorite team a lot more fun – whether they're headed to the playoffs or stuck in the cellar.

When it comes to photo-centric social networks, some may shy away from the Facebook-owned Instagram if they prefer a quieter environment for sharing images. But what if you could dial out the noise and actually tame the Instagram experience instead? That’s the premise behind Gramatica for Instagram, a $0.99 app that serves up a handful of features currently overlooked by the photo sharing service. Want to quickly switch between multiple accounts? Prefer to filter out certain tags, photos, or even entire users? Gramatica has your back.

With an iPhone in my pocket, a trip to the grocery store isn't nearly as unpleasant as it used to be. Thanks to a slew of advanced features that have made my lists smarter and more powerful, I've learned how to save money at checkout and dramatically cut down on the return trips I used to make after forgetting to pick something up. Shopster wants to make the experience even easier. By eschewing common features like iCloud syncing, virtual aisles, and barcode scanning, Shopster focuses on what's most important: What you need to buy and where you need to buy it.